Kopsis response is spot on. Handguns are not typically the easy first build you want to start with.

I know its not as exciting as some of the other builds, but please start with some variant of the harlot. To keep it a bit more exciting, download "BLC Presents the Harlets" which is a mega pack containing all their options. The harlot is largely modular, so in many cases you can mix and match parts to build something unique.

The reasons you sho…

Respectfully, if you're into ARs, do a bipoly. It's by far my favorite AR lower, cost is about $100, I've had mine for over a year now, has ran about 2k rounds through it, I'd trust it with my life. It pairs with any upper you want, I use it with a bca 5.56 upper and a cmmg 9x19 rdb upper.

Nobody has made a 3rd burst FRT. While it is theoretically possible, it would be difficult to design and build something reliable. Heck it might be more difficult to make it for an FRT since the FRT is resetting the trigger every time whereas the FA doesn't. You might be better off learning to use the trigger and get consistent short bursts. Even the 3rd FA burst for the M16a2 was pretty bad. Eugene Stoner said that 3rd burst was the worst …